Truth is that which does not change. Examine your life and identify all that changes as “not truth”. With this outlook, you will find that you are surrounded by only untruth. When you identify untruth, then you will become free from it.
When you do not identify the untruth, you cannot become free from it. Your own experiences in life make you identify your own untruth. As you mature in life, you find everything is untruth, events, situations, people, emotions, thoughts, opinions, concepts, your body, everything is untruth.
It is only then that satsang, the company of truth, happens in the real sense. A mother cannot see the child as untruth until the child becomes an adult. For a baby, sweet is not untruth, and for a teenager, sex is not untruth.
Knowledge is also untruth if it is only words. But as existence, it is truth. Love as an emotion is not truth, as existence, it is truth.