It is very strange that Judaism should ever have sunk into a formal religion of outward observance, when its own Wisdom was so explicit on this point: "My son, attend to my words; incline thine ear unto my sayings. Let them not depart from thine eyes; keep them _in the midst of thine heart_. For they are life unto those that find them, and health to all their flesh. _Keep thy heart_ with all diligence; for out of it are the issues of life."[58] The Greek version, which was very generally used in our Lord's time, had a beautiful variation of this last clause: "In order that thy fountains may not fail thee, guard them in the heart." It was after all but a new emphasis on the old teaching of the book of Proverbs when Jesus taught the necessity of heart purity, and when He showed that out of the heart come forth evil thoughts, and all the things which defile a man.[59] Yet this lesson of inwardness has always been the most difficult of all to learn. Christianity itself has always been declining from it and falling into the easier but futile ways of externalism; and even Christian homes have usually failed in their influence on the young chiefly because their religious observances have fallen into formalism, and while the outward conduct has been regulated, the inner springs of action have not been touched. All conduct is the outcome of hidden fountains. All words are the expression of thoughts. The first thing and the main thing is that the hidden fountains of thought and feeling be pure. The source of all our trouble is the bitterness of heart, the envious feeling, the sudden outbreak of corrupt desire. A merely outward salvation would be of no avail; a change of place, a magic formula, a conventional pardon, could not touch the root of the mischief. "I wish you would change my heart," said the chief Sekomi to Livingstone, "Give me medicine to change it, for it is proud, proud and angry, angry always." He would not hear of the New Testament way of changing the heart; he wanted an outward, mechanical way--and that way was not to be found. The child at first thinks in the same way. Heaven is a place to go to, not a state to be in. Hell is an outward punishment to fly from, not an inward condition of the soul. The child has to learn that searching truth which Milton tried to teach, when he described Satan in Paradise,-- "... within him hell He brings, and round about him, nor from hell One step, no more than from himself, can fly By change of place. * * * * * "'Which way I fly is hell,' cries the miserable being, 'myself am hell; And in the lowest deep, a lower deep, Still threatening to devour me, opens wide, To which the hell I suffer seems a heaven.'"[60]