One notable quote from D.T. Suzuki is, "The ego-shell in which we live is the hardest thing to outgrow." This quote speaks to the idea that our sense of self, or ego, is often the biggest obstacle in our spiritual growth and understanding.

Another memorable quote from Suzuki is, "The truth of Zen is the truth of life." This highlights the central belief in Zen Buddhism that enlightenment and understanding can be found in the present moment and in everyday life experiences.

Suzuki also famously said, "The most important thing in life is to see clearly." This emphasizes the importance of mindfulness and being fully present in order to truly understand and experience life.

In regards to the practice of meditation, Suzuki stated, "The true purpose [of meditation] is to see things as they are, to observe things as they are, and to let everything go as it goes." This highlights the idea that meditation is not about trying to control or change our thoughts, but rather observing them without attachment.

On the concept of emptiness, Suzuki said, "Emptiness which is conceptually liable to be mistaken for sheer nothingness is in fact the reservoir of infinite possibilities." This quote speaks to the idea that emptiness, or the absence of a fixed self, is not a negative or empty state, but rather a source of endless potential.

Finally, Suzuki stated, "The way to control the world is to let it take its natural course." This quote speaks to the idea of non-attachment and the belief that trying to control or force things goes against the natural flow of life.

In conclusion, D.T. Suzuki's quotes offer insights into the key principles and beliefs of Zen Buddhism, emphasizing the importance of mindfulness, living in the present moment, and letting go of the ego in order to find enlightenment and understanding.