The first requirement in Yoga is the development of a feeling of peace inside. This is required to experience the subtile experiences inside which give the knowledge of the inside life. When there is no peace the inside experiences wil be determined by the thougths, feelings, etc. , which form a layer over the subtle feelings. Therefor the first goal of meditation is the realisation of peace in the different parts of the being. This is in line with te explanations, which Sri Aurobindo gives in Letters on Yoga Part III in The Triple Transformation Chris