Jesus also said, "
Thy word is truth." (John 17:17).
I think that there are those who think that we can never come to the knowledge of the truth; because the truth is somehow elusive and therefore if anyone says that they have it, they must be in some form of pride.
However, those who are ever learning and never come to the knowledge of the truth are not put in a good light by holy scripture (see 2 Timothy 3:6-9, esp. v.7).
Therefore it is not necessarily a false statement for someone to say that they do have and know the truth; it is not arrogant or prideful to say so. Especially if one has spent much time studying holy scripture in order to come to the knowledge of it.
2Ti 2:15, Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.
Those who rightly divide the word of truth can be said to have the knowledge of the truth.
Truth = fact.