It is rather a rational policy of release, freeing for higher activities instinctive force too often thrown away.
It is giving the wild beast his work to do, training him.

Since the instincts represent the efforts of this urgent life in us to achieve self-protection and self-realization, it is plain that the true regeneration of the psyche, its redirection from lower to higher levels, can never be accomplished without their help.

We only rise to the top of our powers when the whole man acts together, urged by an enthusiasm or an instinctive need.
Further, a complete and ungraduated response to stimulus--an "all-or-none reaction"-- is characteristic of the instinctive life and of the instinctive life alone.

Those whom it rules for the time give themselves wholly to it; and so display a power far beyond that of the critical and the controlled.

Thus, fear or rage will often confer abnormal strength and agility.