Romans 10:11

For the scripture saith, Whosoever believeth on him shall not be put to shame.

'For' -Faith does result in salvation. And the proof of it? It's in the Bible.

'the scripture saith'. Isaiah 2:16. What did the Scriptures say? Did they say that salvation would be based on merit? No! They talk of the BELIEVER BEING SAVED.

'Whosoever' -'Faith transcends racial bias. It is. "whosoever" issue then. But if it is. "whosoever" issue then it is just as much Gentile as Jew. Just because the Jew has been rejected he need not pout and remain outside. His rejection was the result of UNBELIEF and not due to his racial connection. So why not turn in faith to God and enjoy the blessings?' (McGuiggan p. 311)

'shall not be put to shame' -'No one who believes in him shall have cause for shame' (TCNT); 'will ever be disappointed' (Mof). 'Shame, confusion, fleeing in terror from the face of the great Judge shall not be the lot of him who rests his trust on Christ'. (Lenski p. 658) (1 John 2:28 ***)

Hence we can give Christ our best service, our time, energy, i.e. our life, knowing that all our efforts will not be in vain. There is no reason to 'hold back', or hide our talent in the ground. (Matthew 25:25) There is no good reason to hesitate in applying what God said in our daily lives.