Charles Spurgeon Commentary Galatians 2:21

"I do not make void the grace of God: for if righteousness is through the law, then Christ died for nought." — Galatians 2:21 (ASV)

I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.

If a man can be saved by his own works, and willings, and doings, then Christ's death was an unnecessary piece of torture; and, instead of being the most glorious manifestation of divine love, it was a shameful waste, putting upon Christ a terrible burden of suffering which was totally unnecessary.