Whoever teaches this supreme secret among my devotees, having placed the highest devotion in me, will come to me alone, without doubt.
Explanation
Krishna has just said who should not hear this teaching. Now he says what comes to the person who shares it with his devotees (bhakta) out of the highest devotion (parā bhakti). That person will reach Krishna without doubt. Here "this supreme secret" is usually taken to mean the Gita's teaching, and some traditions read it more narrowly as the final instruction about surrender.