The basis of our salvation

Exactly what is the basis of our( The Elect) salvation ?

I like what Jonah said: in 2

9But I will sacrifice unto thee with the voice of thanksgiving; I will pay that that I have vowed. Salvation is of the LORD.

Salvation is conditioned upon the eternal purpose Of God and our election or being chosen by his soveriegn love...Scripture Text: 2tim 2: 1

9Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began,