Would you kindly advise me as to whether I should leave my wife and child in order to enter deeper into the spiritual life?

In your case, I feel that you should remain with your wife and child. Today you want to leave them; tomorrow you may want to leave God. It is not by leaving aside humanity that you will be able to realise God. If you remain with your family, your realisation will be deeper and more fulfilling. True, at a certain stage of the spiritual journey, the renunciation of the gross material life is necessary, but at a higher stage it is no longer necessary. At the highest stage, we neither seek nor renounce anything.