It is vain to walk in the flesh, seeking to please the desires of the flesh.
It is life to walk by The Spirit, to please the will of God.
Nothing that we have on earth will mean anything in heaven when we get there.
Nothing that we can gain on earth means anything to God.
But the things of the spirit are everlasting, these things will lead us to gain The Kingdom.
Faith pleases God. And God rewards the faithful doer of His Word. It is by our obedience to Him that we see that He is faithful, for we reap the promises of His Word through keeping His Word.
Meaningful life is walking by The Spirit, to do His will and not our own will.