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Once the matter in the universe has reached the point of heat death how will in contract again to repeat the process? To me it is more plausible that we have a meaning and a purpose.
That our atoms didn't randomly form and come together by accident to form a complex organism that is so complex that you could call it machinery, to be then randomly dispersed into nothingness. With no purpose, with no need to follow any rules with no hope. Without moral authority there is no basis for being moral.
To me a purely materialistic explanation is far more incredible then a so called supernatural one.

Why should God have a beginning?
If God is the starting point of all activity He wouldn't be God if He required a beginning. He would not be cause, he would be effect. For there to be a God he would have to be outside of time and unaffected by time. If there is a God, and He created everything would he be subject to the same rules he created? If time started with creation of the universe would God standing outside creation be subject to it? If you compare matter to the concept of God, how could matter be eternal?

The problem here is that many people have a mistaken concept of God. If we conceive of God as physical, anthropomorphic (like man) being, the question of God’s origin is valid. However, such a concept of God is alien to the Bible and to common sense. Consider the following descriptions of God from the Bible:

John 4: 24
God is a Spirit: ...
Matthew 16:17
... for flesh and blood hath not revealed it unto thee, but my father which is in heaven.

Numbers 23:19
God is not a man, that he should ... ;

Obviously, the descriptions and concepts of God given in these passages are that God is a spiritual entity. He exists outside of the three-dimensional physical world in which we live. The Bible further supports this concept of God in the following passages:
Jeremiah 23:23-24
Am I a God at hand, saith the Lord, and not a God afar off? ... Do not I fill heaven and earth? saith the LORD.

2 Chronicles 2:6
But who is able to build a house, seeing the heaven and heaven of heavens cannot contain him? ...

Acts 17:28
For in Him we live, and move, and have our being; ...

Not only is God described as being outside space, but He is also described as being outside of time. Consider the following:
2 Peter 3:8
But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day.

Psalm 90:4
For a thousand years in thy sight are but as yesterday when it is past, and as a watch in the night.

Psalm 102:27
But thou art the same, and thy years shall have no end.

Acts 1:7
...It is not for you to know the times or the seasons, which the Father hath put in his power.

If God is a being that is unlimited in time, and if He has access to every piece of time as if it were now, the question of who created God is an invalid question. The problem is like asking a student to draw a four-sided triangle. The terminology is self-contradictory.
When asked “Who or what created God?” we are making the assumption that God was created. If God exists outside of time and space, and if He is the Creator of time and space, He obviously was not created! God began the beginning! This is why He says, “I am Alpha and Omega, the beginning and the end, the first and the last” (Revelation 22:13).
God created time. The statement of Genesis, “In the beginning God created the heaven and the earth,” is making reference to the creation of time. The reason that things like heat death, the expansion of the universe, and the depletion of hydrogen do not apply to God is because He is outside of time. God has always been. He did things before time began (see 1 Corinthians 2:7). He not only began time; He will also end it. When time ends, all matter and all mankind will enter eternity—a timeless condition free of the negative things that time brings upon us now.

2 Peter 3:10-11
But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up. Seeing then that all these things shall be dissolved, what manner of persons ought ye to be in all holy conversation and godliness.
Revelation 21:4
And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away.