It means there is a good side and a bad side.

In philosophy, everything contains two aspects that are both opposite and unified. Everything has two points, not one.

Contradiction has two basic attributes: identity and struggle. The identity of contradiction refers to the nature and tendency of the two parties to the contradiction to be interdependent and interconnected. The combative nature of contradiction refers to the mutually exclusive and mutually separated nature and tendency of contradictory opposites. The identity and struggle of contradictions are interconnected and mutually reinforcing.

In the contradiction of things, the struggle of contradiction is unconditional and absolute, and the identity of contradiction is conditional and relative. The combination of unconditional absolute struggle and conditional relative identity constitutes the contradictory movement of things and promotes their development.

Extended information:

Famous quotes expressing "Everything has two sides, everything has pros and cons"

1. "Xunzi·Ai Gong": Water Energy Carrying a boat can also capsize it.

Vernacular translation: Water can carry a boat, but it can also overturn a boat. This means that rulers are like boats and people are like water. Water can not only allow the boat to sail safely, but also overthrow, engulf, and sink the boat in the water.

2. "Poet's Jade Chips": If there is no frost or snow in the sky, the green pines are not as good as the grass. If there are no mountains and rivers on earth, how can anyone maintain a level road?

Vernacular translation: If there is no frost or snow, the pine trees will not grow as high as the grass. If there were no mountains and long rivers on the earth, no one would value a flat road.

3. Xunzi's "Encouragement to Learning": Earthworms have no sharp claws and teeth, nor strong bones and muscles. They eat earth and drink from the underworld.

Vernacular translation: Earthworms do not have sharp claws and teeth, but they have strong muscles and bones, but they can eat soil upwards and drink water from the soil downwards. This is because they are single-minded.