Truth is truth regardless of the source. “All truth is God’s truth...” Jesus Himself said He Himself IS the truth.....
And actually - the main reason He came was to TESTIFY to the truth (John 18:37) - which, when He stated this to Pilate motivated Pilate to ask, “What is truth?” - implying that truth could not be known or determined.
Satan’s greatest deceptions are truth mixed with hidden or subtle lies. This is what the Prosperity Gospel is - though to most believers, the lies are fairly obvious. Only the naive and self-motivated buy into them.....