How do we know that God always finishes what He starts?

The certainty that God always finishes what He begins is underscored through various biblical examples. From creation in Genesis 1, where God proclaimed 'it was very good' on completing His work, to the deliverance of Israel from Egypt in Exodus 12, we see God’s unwavering ability to accomplish His purposes. In Isaiah and Jeremiah, God asserts His commitment to His declared plans, indicating that His word will not return void. This pattern assures believers that He will complete the good work begun in them, not subject to human frailty or opposition.