Now that's a truly daunting prospect. Here, however, is what saves us from it, (taken from the Eucharistic prayers):
"May He make us an everlasting gift to You."
So, praise God, it is not entirely what we make of ourselves, but what God in Christ makes of us. Our task is less to make something of ourselves than to open ourselves to Eucharistic assimilation.
Everyone has to pull his or her own weight, but God does the heavy lifting.