Buy the truth, and sell it not; also wisdom, and instruction, and understanding (Pro. 23:23).
The fact that no man's knowledge of Truth is completely perfect should never be used as an excuse for error. Recognizing our imperfect knowledge should keep us humble and continually searching to increase our understanding––this is whom God rewards (Heb. 11:6).
My imperfect grasp of Truth is not the final word, thus I should be willing to have my beliefs and conclusions scrutinized if I am truly, diligently seeking God's will. We are to "seek it like silver and search it out like hidden treasure" (Pro. 2:5). Shouldn't I be willing to have my beliefs exposed as false if it means I can take hold of real treasure?
If my understanding of God's Word is imperfect, and my fellowship with others is based upon my understanding of God's Word, then shouldn't I have fellowship with all professing faith? Or at least broaden the definition of what it means to have faith and embrace all who claim to follow Jesus?
I must be true to my conscience and "hold true to what I have attained" (Phil. 3:16). If I knowingly embrace something I am convinced is contrary to God's will (1 Cor. 5:9-11), or fail to have fellowship with the one God commends (3 Jn. 9-10), I indict myself before God. My refusal or granting of fellowship will have no bearing on the other's standing with God, but it will affect my standing with God. I must be "fully convinced in my own mind" that I have fellowship with Truth loving, Truth practicing saints, because I will "give an account of myself to God" (Rom. 14:5, 12).
God intended His Word to be understood (Jn. 20:31) and He inspired men to write in such a way as to be understood (Eph. 3:4; 1 Cor. 2:13). I must live and worship in a way consistent with my understanding of that divinely inspired standard. If I do not, I am not being honest with myself, with others, or with God.
If I come to erroneous conclusions concerning God's Word, then let others teach me "the way of God more accurately" (Acts 18:26). Until then I must cling to the Truth I've bought, and must not part with it for pleasure, honor, wealth, or even love. If I do, I abandon any hope I have of fellowship with God and finding peace and salvation in Him.