"In Zen they say: 'Only an empty mind can see the Buddha.'
This is impossible to achieve.
An empty mind is a 'happy accident'. It cannot be willed.
But! Focussing on one thing only - one thought, one breath, one movement, one sound, one image, a single word - this is called: 'Thought of One Thought.'
...Then there is an opportunity for thoughts to cease.
We must diligently cultivate the skill of Concentration; develop the ability to Focus.
From there, Miracles can happen.
This is called: Practice.