Jesus said unto them... If ye have faith as a grain of mustard seed... nothing shall be impossible unto you. (Matthew 17:20)
God wants us to be like the mustard seed. It grows with no thought of what lies ahead. It has no care as to even if it will survive and yet it takes root and pushes its way through the hard soil to an unknown future.
This is what heaven is like. We leave all our worries and cares to God and just grow in His likeness. He will take care of everything. We are loved by Him and just as the mustard seed accomplishes life so to, there will be no limit to what we can accomplish when we leave all our worries and cares to God.