To “have an outline of sound words” (2 Timothy 1:13) means to hold firmly to the clear pattern of true teaching that comes from God. Paul encourages believers to remember and follow the faithful message they have learned, keeping it with faith and love in Christ Jesus. It is a call to protect and preserve the truth of the gospel, guarding it through the help of the Holy Spirit and living it out with loyalty and courage, just as faithful servants like Onesiphorus did.