For any two objects, the one with the higher temperature always has more thermal energy. why

Temperature is directly proportional to thermal energy of a body.

Thermal energy is one of the numerous forms of kinetic energy which dependent on the motions of the particles in a body.

When the temperature of a body increases, it possess more kinetic thermal energy. In this case, the molecules of the body gains more energy and begins to vibrate until they attain maximum kinetic energy.

The higher the temperature the more the kinetic energy.