'Ought' in the Bible

We ought to thank God always for you, brethren, even as it is meet, because your faith increases exceedingly, and the love of each one of you all towards one another abounds;

But we ought to give thanks to God always for you, brethren beloved of the Lord, that God has chosen you from the beginning to salvation in sanctification of the Spirit and belief of the truth:

For ye know yourselves how ye ought to imitate us, because we have not walked disorderly among you;