What do you mean by love, truth, and beauty?

When the mind is stable and free from restlessness there is no rejection of what is in the moment; there is a profound acceptance or welcoming of What Is; thus love.

Truth is the realization of who we are, as opposed to what we imagined ourselves to be. The corollary is that the true nature of the universe is also known; and known to be no different or separate from What I Am: Consciousness, thus truth.

Beauty because when the mind is not resisting What Is it naturally focuses on being happy and sharing happiness, thus beauty.

We could say that such trinity corresponds to the natural and rightful operation of the three centers of sentient beings: emotional, intellectual, and physical (moving-instinctive).