Why: fix your mind on Krishna alone, let your intellect enter into him, you will dwell in him alone hereafter, without doubt, offering the most direct, simple instruction so far, without qualification or complexity.

In life: sometimes, after a long, layered explanation of multiple valid approaches, the actual practical advice for you specifically really is this simple, focus here, consistently.

Teaching: after weighing multiple valid approaches to something important, don't be afraid to land on the simplest, most direct version of the actual instruction for your specific situation, simplicity isn't a failure to appreciate nuance, it's often the genuinely useful next step.