From The Baal Shem Tov: We must despise all the “pleasures” of this world, from the pleasure of food, sex etc. – for anyone who has tasted real pleasure, the spiritual bliss – this is like a person who makes a sudden windfall and his happiness causes that all other pleasures seem worthless – furthermore, we must place in our hearts the true fear of God – this is understood, like if you traveled to a palace – as you enter you would feel a fear – hence anyone connecting to God should also feel a palpable awe – and this eliminates all physical fears.