Wonderful works do not save you. Doing His will, keeping His commands will. Saved by grace and kept by obedience.
We are saved by grace through faith
(Ephesians 2:8-9) We are also kept by grace (by the power of God-
1 Peter 1:3-5)
Ephesians 2:8 For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:
Ephesians 2:9 Not of works, lest any man should boast.
1 Peter 1:3 Blessed be the God and Father of our Lord Jesus Christ, which according to his abundant mercy hath begotten us again unto a lively hope by the resurrection of Jesus Christ from the dead,
1 Peter 1:4 To an inheritance incorruptible, and undefiled, and that fadeth not away, reserved in heaven for you,
1 Peter 1:5 Who are kept by the power of God through faith unto salvation ready to be revealed in the last time.
The "works" we do are the result of our salvation, but those "works" do not keep us saved. We "work out" that which God has already "worked in" us.
(Ephesians 2:10)
Ephesians 2:10 For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.
Works that are built what Christ has instilled in us bring rewards
(1 Corinthians 3:8-15)
1 Corinthians 3:8 Now he that planteth and he that watereth are one: and every man shall receive his own reward according to his own labour.
1 Corinthians 3:9 For we are labourers together with God: ye are God's husbandry, ye are God's building.
1 Corinthians 3:10 According to the grace of God which is given unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon. But let every man take heed how he buildeth thereupon.
1 Corinthians 3:11 For other foundation can no man lay than that is laid, which is Jesus Christ.
1 Corinthians 3:12 Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble;
1 Corinthians 3:13 Every man's work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man's work of what sort it is.
1 Corinthians 3:14 If any man's work abide which he hath built thereupon, he shall receive a reward.
1 Corinthians 3:15 If any man's work shall be burned, he shall suffer loss: but he himself shall be saved; yet so as by fire.
The man made doctrine of monetary tithing is a "work" which is NOT built upon the foundation of Jesus Christ. It will be burned as "hay, wood, and stubble."
"Only one life, 'twill soon be past, Only what's done for Christ will last." (not sure where that quote comes from)