To every young man who enters the ministry, Paul's words to Timothy are spoken, “Take heed unto thyself, and unto the doctrine.” [1 Timothy 4:16.] “Thyself” needs the first attention. First give yourself to the Lord for purification and sanctification. A godly example will tell more for the truth than the greatest eloquence, unaccompanied by a well-ordered life. Trim the lamp of the soul, and replenish it with the oil of the Spirit. Seek from Christ that grace, that clearness of comprehension, which will enable you to do successful work. Learn from Him what it means to work for those for whom He gave His life. GW 104.3
“Take heed,” first to yourself, and then to the doctrine. Do not let your heart become hardened by sin. Closely examine your manners and habits. Compare them with the word of God, and then cut away from the life every wrong habit and indulgence. Kneel before God, and plead with Him for an understanding of His word. Be sure that you know the real principles of the truth; and then when you meet opponents, it will not be in your own strength; and angel of God will stand by your side, to help in answering every question that may be asked. Day by day you are to be shut in, as it were, with Jesus; and then your words and example will have a strong influence for good. GW 105.1