I think it is very true that people are created to have a time when they seem to do their best. My wife, is a night person. Wake her up at 6 am, and she does horribly the entire day. Keep me up past 1 am, I am of little worth the next day regardless of how late I sleep in.

currently it is almost 4 am here and I have been up for an hour. Today is a bit unusual since I was able to go to bed early and woke up a bit earlier than usual. I find that my thoughts are most clear in the morning and this is the time I strive to get in with God. The morning is meant for preparation and the evening for reflection. Both are essential to a heathy walk with the Lord.

Mark 1:35

“And in the morning, rising up a great while before day, he went out, and departed into a solitary place, and there prayed.”

S.T. 
Acts 20:24
"none of these things move me..."