Matthew 3:8
Demonstrate by your lives that you have [really] repented,
John 8:39
They answered Him, "Our forefather was Abraham." Jesus replied to them, "If you were Abraham's descendants, you would do the [kinds of] deeds that Abraham did.
Romans 2:28-29
For that person is not a Jew who is one [merely] on the outside. And circumcision is not [merely] an outward physical ordinance.
Romans 7:13
Was this [commandment] then, which was intended for my good, [actually] responsible for my [spiritual] death? Certainly not! But so that sin could be seen as [truly] sinful, it produced [spiritual] death in me through something that was good [i.e., the commandment against sinning]. This was so that, by means of the commandment [against sinning], sin could be seen as extremely sinful.
Romans 9:6-13
But it is not as if the word of God [i.e., His promise to Israel] has failed [in its fulfillment]. For not all those descended from the Israelites are [truly] Israelites [i.e., God's people].
2 Corinthians 6:12
We are not holding back [our affections] from you, but you are holding back your affections [from us].
2 Timothy 3:5
[These people] maintain an appearance of being godly, but they have denied its power; [you should] turn away from such people.