'Mightily' in the Bible

Thus mightily did the Lord's Message spread and triumph!

And my language and the Message that I proclaimed were not adorned with persuasive words of earthly wisdom, but depended upon truths which the Spirit taught and mightily carried home;

To this end, like an earnest wrestler, I exert all my strength in reliance upon the power of Him who is mightily at work within me.