847. That 'the waters receded from off the earth, going back and forth' means fluctuations between truth and falsity is clear from what has been stated, namely about 'the waters of the flood' or deluges, in reference to Noah, meaning temptations. And because the subject here is the first state following temptation, 'the waters receded, going back and forth' can mean nothing else than fluctuation between truths and falsities. But the nature of this fluctuation cannot be known unless one knows what temptation is, for the nature of a temptation determines that of the fluctuation following temptation. When temptation is celestial the fluctuation is between good and evil; when temptation is spiritual it is between truth and falsity; and when temptation is natural the fluctuation is between the things that belong to evil desires and things which are their opposite.

[2] The types of temptation are numerous. In general they are celestial, spiritual, and natural, which must not in any way be confused with one another. Celestial temptations can exist only with people who are moved by love to the Lord; spiritual temptations only with those who are moved by charity towards the neighbour; while natural temptations are utterly different again. Indeed the latter are not temptations at all but merely anxious cares resulting from attacks on people's natural loves caused by misfortune, sickness, and abnormal condition of the blood and fluids in the body. These few considerations make it to some extent possible to know what temptation is, that is to say, the distress and anxiety caused by things that clash with a person's loves. With people moved by love to the Lord, whatever attacks that love to the Lord produces inmost torment. This is celestial temptation. With those moved by love towards the neighbour, which is charity, whatever attacks this love leads to a tortured conscience. This is spiritual temptation.

[3] But in the case of people who are natural, those experiences which they so often call temptations, and the pricks of conscience, are not really temptations at all but merely anxious cares resulting from attacks on their loves - for example, when they foresee and feel that they are being deprived of honour, the good things of this world, reputation, pleasures, physical powers, and so on. Nevertheless these so-called temptations do normally achieve some good. Temptations are also experienced by people who are moved by natural charity, and so by all manner of heretics, by gentiles, and by idolaters. They are caused by the things which go against the way of life which their faith demands and which they hold dear. These however are anxious cares, which are mere imitations of spiritual temptations.