POINT: Grace is neither of two "law"s in Mt 22:36-40.
Charity never faileth is neither of two law law loves.
Albeit one greater of great/greater, but still fails.

His Grace cannot lie (law) nor die (law).
Law Law does both, in both the OT and NT.

Grace neither tempts(laws) nor can be tempted(lawed).
Law Law does both: tempts & gets tempted: Hebrews 3.

OT Law: Old and dead way.
NT Law: New and dead way.
More excellent: New and "Living" Way:
neither broadmindead nor narrowmindead.

The GRACE of our Lord Jesus Christ with you all. Amen.