But . . .

But now, apart from law . . . (Rom 3:21)

But when he . . . was pleased to reveal his Son to me . . . (Gal 1:16)

But God, being rich in mercy . . . (Eph 2:4)

The wonder of the gospel--God looked down and saw our hard-heartedness, and did not say therefore. He said: But.

We think: I fail God. Therefore.
He says: You're right. But.