John 10:27-30
My sheep listen to my voice, and I know them, and they follow me.
1 Corinthians 3:5-15
After all, who is Apollos? And who is Paul? They are [only] servants through whom you believed [in Christ], with each one doing what the Lord gave him to do.
2 Timothy 1:12
For I am suffering these things [See verse 8] for this reason [i.e., because of being a Gospel preacher]. Yet I am not ashamed because I know whom I have believed in [i.e., Jesus], and I am convinced that He is able to guard what I have entrusted to Him [i.e., Paul's spiritual well-being] until that day [i.e., the day of judgment].
1 Peter 1:5
Through God's power you are protected by [your] faith, so that you can expect to be saved in the end.