Heb 4:12 For the word of God is living, and active, and sharper than any two-edged sword, and piercing even to the dividing of soul and spirit, of both joints and marrow, and quick to discern the thoughts and intents of the heart.
From G2923; decisive (“critical”), that is, discriminative: – discerner.
Interesting thing I have just learnt. Did you know that the word ‘discern’ means to be critical? We get our word ‘critical’ from the Greek word ‘kritikos’.
A discerner (κριτικὸς)
N.T.o. olxx. The word carries on the thought of dividing. From κρίνειν to divide or separate, which runs into the sense of judge, the usual meaning in N.T., judgment involving the sifting out and analysis of evidence. In κριτικὸς the ideas of discrimination and judgment are blended. Vulg. discretor.
So… if you are standing against teaching which falls short and fails to measure up with the Word of God and someone says to you… “you have a critical Spirit”, then you should say, “I certainly hope so!”
Learn more about this in a sermon by Jacob Prasch called “Are believers being deceived”.