Doesn't karma make more sense than grace?
Karma makes sense as a law. But nobody can live under it: every one of us has done harm we cannot repay. Grace is not unfair; it is justice paid by someone else.
Karma says you get what you deserve. The gospel says God gave his Son so that you would not get what you deserve. That only sounds unfair until you need it. The thief on the cross had no time to build merit; Jesus promised him paradise.
“Student, sentient beings are the owners of their deeds and heir to their deeds. Deeds are their womb, their relative, and their refuge. It is deeds that divide beings into inferior and superior.”
Majjhima Nikaya 135:4.1-4.3, The Shorter Analysis of Deeds (tr. Bhikkhu Sujato) · context
23For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
Romans 6:23 (WEB) · context
42He said to Jesus, “Lord, remember me when you come into your Kingdom.” 43Jesus said to him, “Assuredly I tell you, today you will be with me in Paradise.”
Luke 23:42-43 (WEB) · context
25whom God sent to be an atoning sacrifice through faith in his blood, for a demonstration of his righteousness through the passing over of prior sins, in God’s forbearance; 26to demonstrate his righteousness at this present time, that he might himself be just and the justifier of him who has faith in Jesus.
Romans 3:25-26 (WEB) · context