Think of David, a young man, facing Goliath, the Philistine Giant, armed with nothing other than a shepherd's sling and 5 smooth stones. Think of the risk he took. Nothing of value is gained without risk, without some cost, especially things that are really valuable, spiritual life itself. Arcana Caelestia 8164. There are spiritual temptations, and there are natural temptations.
Spiritual temptations belong to the internal man, but natural ones to the external man.
Spiritual temptations sometimes arise without natural temptations, sometimes with them. Natural temptations exist when a man suffers as to the body, as to honors, as to wealth, in a word, as to the natural life, as is the case in diseases, misfortunes, persecutions, punishments, and the like. But spiritual temptations belong to the internal man, and assault his spiritual life. In this case the anxieties are not on account of any loss of natural life, but on account of the loss of faith and charity, and consequently of salvation. Arcana Caelestia 8165.