Charles Spurgeon Commentary Galatians 5:2-3

"Behold, I Paul say unto you, that, if ye receive circumcision, Christ will profit you nothing. Yea, I testify again to every man that receiveth circumcision, that he is a debtor to do the whole law." — Galatians 5:2-3 (ASV)

Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing. For I testify again to every man that is circumcised, that he is a debtor to do the whole law.

If you begin being saved by the law, you must go through with it. You cannot take the principle of law and the principle of grace, and blend those two together. They are like oil and water; they will never mix. If salvation is of works, it is not of grace; and if it is of grace, it is not of works. You cannot rely on the two contrary principles of merit and of favor.