We are forced, somehow, to reconcile complementary principles and duties.
A complementary principle that emphasize this issue is "You Ain't Gonna Need It" and, more generally, the KISS principle.
Additional and complementary principles of governance also exist.
In contrast, Aristotle defines matter and the formal/forming principle as complementary principles that together compose one independent thing (substance).
However, it added to these what Aglietta (1979: 118) refers to as 'two complementary principles'.
Yin Yoga is based on the Taoist concept of yin and yang, opposite and complementary principles in nature.
These balanced, complementary and interactive principles are thinking material and an approach which the "Movement" seeks to spread in order to revive and revitalize the society.
Vladimir appears as the complementary masculine principle, or perhaps the rational persona of the contemplative type.
That is to say, they are two interdependent and complementary principles that inhere naturally (implicitly) within the law of identity, as its essential nature.
(Even towards those to whom one's initial relation is that of "the left arm repels," one must subsequently apply the complementary principle of "the right arm draws near").