…holding fast the faithful word which is in accordance with the teaching, so that he will be able both to exhort in sound doctrine and to refute those who contradict.
Titus 1:9 (emphasis mine)
The relationship an elder has with the word of God is paramount. To hold fast means to cling to and be devoted to. An elder must have a personal commitment to know God’s word and it should be reflected in his understanding of theology and his personal disciplines. It is also essential that his understanding of the Scripture is consistent with the teaching that has already been given. His role is NOT to come up with new truth. Rather, it is to faithfully teach the truth that has already been given. This is absolutely essential if an elder is to be qualified and able to accomplish the work God has called him to.
Be diligent to present yourself approved to God as a workman who does not need to be ashamed, accurately handling the word of truth.
2 Timothy 2:15All Scripture is inspired by God and profitable for teaching, for reproof, for correction, for training in righteousness; so that the man of God may be adequate, equipped for every good work.
2 Timothy 3:16–17
We have already considered the qualification able to teach. This qualification is a demonstration of his ability to teach. Keep in mind that this goes beyond a man affirming the doctrinal statement of the church. He must be well-versed in the Scriptures and he must be a diligent student of God’s word.
A man who is lacking in this qualification should not pursue eldership. After all, he will be very accountable for his service as an elder.
Let not many of you become teachers, my brethren, knowing that as such we will incur a stricter judgment.
James 3:1Obey your leaders and submit to them, for they keep watch over your souls as those who will give an account. Let them do this with joy and not with grief, for this would be unprofitable for you.
Hebrews 13:17