1 Timothy 6:13 - Matthew Poole's English Annotations on the Holy Bible

The apostle's care of the church showeth itself in these severe charges laid upon Timothy; though one whom he knew to be a faithful minister, he chargeth him, calling God to witness that he had fulfilled his part in laying this charge upon him. The name he here giveth unto God may possibly have a particular reference to the state of the gospel at that time, the doctrine and profession of which had many enemies, and so it is made use of here to comfort and encourage Timothy. God is called he who quickeneth the dead, Romans 4:17; here, he who quickeneth all things, and before Christ Jesus, who before Pontius Pilate witnessed a good confession; he proposeth the example of Christ to Timothy, as being the Head of those that witness a good confession.