Meditation brings wisdom; lack of mediation leaves ignorance. Know well what leads you forward and what hold you back, and choose the path that leads to wisdom. – Buddha
Those who eat too much or eat too little, who sleep too much or sleep too little, will not succeed in meditation. But those who are temperate in eating and sleeping, work and recreation, will come to the end of sorrow through meditation. – Bhagavad Gita
When we visualize something, we establish a relationship to the thing itself, not to some mere subjective representation of it inside us. – Medard Boss