1 Corinthians 7:37; 1 Corinthians 10:12; 1 Corinthians 15:1

37 Nevertheless he that standeth stedfast in his heart, having no necessity, but hath power over his own will, and hath so decreed in his heart that he will keep his virgin, doeth well.
12 Wherefore let him that thinketh he standeth take heed lest he fall .
1 Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received , and wherein ye stand ;