When two sources say the same thing in different words, there is nothing to choose between them. What matters is the meaning, not the wording. Rival authorities who differ only in how they phrase things are not truly in disagreement.
Rain that is about to fall can be forecast from the signs around it, such as clouds, winds and the look of the heavens. A forecaster does not need a law of nature first. Close watching of present conditions is enough to say what the next hours and days will bring.
The color, size and brightness of a planet, and the path it takes across the stars, are read as signs of how a year will go. A clear, white, bright disk points to good fortune. A smoky one warns of drought. A planet that moves farther in a year, or travels a northern path, promises plenty and health.
A true predictor is not someone who has mastered only one narrow method, such as birth charts. He must also know the wider science of signs, covering weather, planets, the body and the right times for marriages and similar events. Reading the future well means connecting many fields, not just one.