Some responses to planetary movement are as obvious as The Moon dictating Earth's ocean tides, while others are subtler and deal in the realm of pure emotion. To begin the process of understanding astrology, you have to realize that Earth is effected dramatically by two cosmic forces - The Sun and The Moon. The movement of The Sun creates time, dividing space into day and night. As The Sun rises in the East, earthly life, in all forms, is alerted to wakefulness and the reality of the Life-Cycle. The Sun gives the Earth light and with solar light comes heat, which generates vital energy.
Vital energy is the catalytic spark that warms the seed and initiates growth.
Plant life absorbs sunlight and transforms it into the green of chlorophyll, which creates oxygen, which all creatures breathe. As The Sun sets in the West, life is directed to retreat to inner consciousness in order to rest and renew. As The Sun initiates growth, The Moon inspires it and gives it space to individuate. By following the courses of The Moon, one comes to know when to create and when to complete, just as the Natural World knows when to birth and when to die. Following the patterns of The Sun's movement is to chart the time, which it creates.