Genesis 30:2-3 Jacob became angry with her and said, "Am I in the place of God, who has kept you from having children?" Then she said, "Here is Bilhah, my maidservant. Sleep with her so that she can bear children for me and that through her I too can build a family."
The conversation that Rachel and Jacob have here sounds like one that many spouses have with one another. The wife blames Jacob for not getting her pregnant and Jacob gets angry at her and tells her it's not his fault. Like any good husband, he should have just admitted it was ALL his fault and that he would try harder next time . . .
How quick are we to try and rush God? We want what we want and we want it . . . now! Rachel wanted a child so badly, she was willing to rush ahead of God and do something foolish to satisfy herself. God's timing is perfect - and when we try and interfere with that - we mess everything up. The man you didn't wait on God to bring you - Can I get a witness? The job that you could've waited a little longer before you accepted it. So many times we think we know what's best that we don't let God handle it.
It's not, "God do it now or I'll have to do it myself". It's, "God, help me to be patient and know when You have chosen the right time for me." It's so much more rewarding that way.