It's true that God spoke through dreams to some people in the past, but even then, it was a rare occurrence. Hebrews 1:1-2 Hebrews 1:1-2  God, who at sundry times and in divers manners spoke in time past to the fathers by the prophets,
 Has in these last days spoken to us by his Son, whom he has appointed heir of all things, by whom also he made the worlds;
American King James Version×indicates that the principal way in which God communicates with people today is through Christ via the written Word that God inspired, not through visions or dreams. Additionally, the Scripture advises Christians to be on guard against spirits (fallen angels or demons) that attempt to mislead (1 John 4:1 1 John 4:1Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
American King James Version×). One of the ways that they deceive people is through paranormal activities.
As Christians, we must guard the information that comes into our minds.
The Bible talks of some dreams that are deceptive (Jeremiah 23:25-27 Jeremiah 23:25-27  I have heard what the prophets said, that prophesy lies in my name, saying, I have dreamed, I have dreamed.
 How long shall this be in the heart of the prophets that prophesy lies? yes, they are prophets of the deceit of their own heart;
 Which think to cause my people to forget my name by their dreams which they tell every man to his neighbor, as their fathers have forgotten my name for Baal.
American King James Version×). Most dreams are a natural part of the sleeping state. The Bible talks about the fleeting and unreal nature of dreams (Psalms 126:1 Psalms 126:1When the LORD turned again the captivity of Zion, we were like them that dream.
American King James Version×; Isaiah 29:8 Isaiah 29:8It shall even be as when an hungry man dreams, and, behold, he eats; but he wakes, and his soul is empty: or as when a thirsty man dreams, and, behold, he drinks; but he wakes, and, behold, he is faint, and his soul has appetite: so shall the multitude of all the nations be, that fight against mount Zion.
American King James Version×).
Ecclesiastes 5:3 Ecclesiastes 5:3For a dream comes through the multitude of business; and a fool's voice is known by multitude of words.
American King James Version×says, "A dream comes through much activity," implying that normal dreams are natural outgrowths of the stimuli we receive in our waking hours. Dreams could come as a result of our own thoughts, what we hear others say, as well as from material we read or watch (movies or videos).
As Christians, we must guard the information that comes into our minds. If we expose our minds to violence or sexually oriented material, for example, these stimuli can cause unwanted dreams. Paul gives us excellent guidelines on how to orient our thinking in Philippians 4:8 Philippians 4:8Finally, brothers, whatever things are true, whatever things are honest, whatever things are just, whatever things are pure, whatever things are lovely, whatever things are of good report; if there be any virtue, and if there be any praise, think on these things.
American King James Version×: "Finally, brethren, whatever things are true, whatever things are noble, whatever things are just, whatever things are pure, whatever things are lovely, whatever things are of good report, if there is any virtue and if there is anything praiseworthy—meditate on these things."
Having done all that we can to ensure that we have a healthy environment and that we think positive thoughts, we can also ask God to bless us with peaceful and restful sleep. Psalms 127:2 Psalms 127:2It is vain for you to rise up early, to sit up late, to eat the bread of sorrows: for so he gives his beloved sleep.
American King James Version×says, "He gives His beloved sleep."
Joel did prophesy of a future time, before Jesus Christ's return, when there would be heavenly signs and "your old men shall dream dreams, your young men shall see visions" (Joel 2:28-31 Joel 2:28-31  And it shall come to pass afterward, that I will pour out my spirit on all flesh; and your sons and your daughters shall prophesy, your old men shall dream dreams, your young men shall see visions:
 And also on the servants and on the handmaids in those days will I pour out my spirit.
 And I will show wonders in the heavens and in the earth, blood, and fire, and pillars of smoke.
 The sun shall be turned into darkness, and the moon into blood, before the great and terrible day of the LORD come.
American King James Version×). The apostle Peter used this prophecy to help explain the special miracles that accompanied the giving of God's Spirit on the Day of Pentecost (Acts 2:15-17 Acts 2:15-17  For these are not drunken, as you suppose, seeing it is but the third hour of the day.  But this is that which was spoken by the prophet Joel;  And it shall come to pass in the last days, said God, I will pour out of my Spirit on all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams:
American King James Version×). But it is clear from the New Testament example that Christians are to seek God's Word from the inspired Scriptures and sound biblical teaching, not private interpretations (2 Timothy 3:15-17 2 Timothy 3:15-17  And that from a child you have known the holy scriptures, which are able to make you wise to salvation through faith which is in Christ Jesus.  All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:  That the man of God may be perfect, thoroughly furnished to all good works.
American King James Version×; 2 Timothy 4:2-4; 2 Peter 1:20-21 2 Peter 1:20-21  Knowing this first, that no prophecy of the scripture is of any private interpretation.  For the prophecy came not in old time by the will of man: but holy men of God spoke as they were moved by the Holy Ghost.
American King James Version×).