Annie - are you still there.? Just woke up and remembered this quote that I was using in a letter recently. It is not a Bible quote, but from a very old Watchtower - almost the exact words you were looking for. I just knew I had seen those words somewhere.
Beware of "organization." It is wholly unnecessary. The Bible rules will be the only rules you will need. Do not seek to bind others' consciences, and do not permit others to bind yours. Believe and obey so far as you can understand God's Word to-day, and so continue growing in grace and knowledge and love day by day…What shall be our Standard by which we may know the truth and prove it? We answer, The Word of God "is profitable for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be perfect [-ed in knowledge and conduct], thoroughly furnished unto all good works. [2 Timothy 3:16,17]
Zion’s Watchtower September 15, 1895 Page 216 Jeff