Question:
Is it true that the Spirit only uses Scripture to teach us things?

Answer:
Yes, the words of Scripture have been given by the Spirit, and the following verses tell us that the Spirit God reveals God’s precious things by the Scriptures:

“As it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love Him. But God hath revealed them unto us by His Spirit: for the Spirit searcheth all things, yea, the deep things of God. . . . Now we have received, not the spirit of the world, but the Spirit which is of God; that we might know the things that are freely given to us of God. Which things also we speak, not in the words which man’s wisdom teacheth, but which the Holy Spirit teacheth; comparing spiritual things with spiritual” (1 Corinthians 2:9-13).
We also learn character through trials:“Knowing this, that the trying of your faith worketh patience. But let patience have her perfect work, that ye may be perfect and entire, wanting nothing” (James 1:3, 4).