"John answered, A man can receive nothing [he can claim nothing, he can take unto himself nothing] except as it has been granted to him from heaven. [A man must be content to receive the gift which is given him from heaven; there is no other source.]" (John 3:27 amp)

There is sufficient grace to live without sin each second that ticks on this earth despite our humanity; it is found in *believing that you have died in the death of Jesus on the Cross* and asking Jesus to do to you *the same irreversible thing He did on Calvary to your whole being (spirit, soul and body 100%) not just in some aspects of your life*
Thus "but those who drink of the water that I will give them *will never be thirsty(for sin/lust /fleshly-fruits)*. The water that I will give *will become in them a spring of water gushing up* to eternal life" (John 4:14)