How do you know they are true?
If you do God's will, you will know.
Alma - experiment upon the word of God
It requires faith to try.
More testimonies are gained on feet rather than on knees.
Adulterous woman - Sadducee's and Pharisees brought her to Christ to try to trap him - to try to make him blaspheme against the Law of Moses.
Jehovah wrote the Law of Moses with his finger. Christ wrote in the dirt while he spoke to the Sadducee's and Pharisees.
John 8:12, D&C 84:45-46 - word of the Lord = truth = light. Christ is the source of truth and light and knowledge.
Truth is revealed from the Holy Ghost - revelation.
John 8:43-59 Christ identifies himself as Jehovah.