路遥知马力，日久见人心

just as distance determines the stamina of a horse, so does time reveal a person's true heart (proverb)

surname Lu

road / CL:條|条[tiao2] / journey / route / line (bus etc) / sort; kind

distant / remote / far / far away

to know / to be aware

surname Ma / abbr. for Malaysia 馬來西亞|马来西亚[Ma3 lai2 xi1 ya4]

horse / CL:匹[pi3] / horse or cavalry piece in Chinese chess / knight in Western chess

horsepower

power / force / strength / ability / strenuously

abbr. for 日本[Ri4 ben3], Japan

sun / day / date, day of the month

(long) time / (long) duration of time

to see / to meet / to appear (to be sth) / to interview / opinion / view

to appear / also written 現|现[xian4]

person; people / CL:個|个[ge4],位[wei4]

popular feeling / the will of the people

heart / mind / intention / center / core / CL:顆|颗[ke1],個|个[ge4]