What does Eckhart Tolle mean by “presence?”

Eckhart Tolle quotes on presence

Eckart Tolle is a German spiritual teacher and speaker who suffered from depression for several years before finding himself awakened (to the simple joy of being [alive]). Following his awakening, Eckhart Tolle chose to leave the PhD program he had until then been enrolled in, and instead spent a period of two years in a state of deep enjoyment of life, spending most days observing life from park benches, fully…