路遥知马力日久见人心的英文：
[Literal Meaning]
road/distant/know/horse/strength/day/long/reveal/person/heart
A horse's strength will be known by a long distance travel, while a person's heart will be revealed by time.

[解释]
路途遥远才能知道马的力气大小，日子长了才能看出人心的好坏。

[Explanation]
Time reveals a person's heart.

[例子]
路遥知马力，日久见人心。时间长了你就会发现其实他是个心地非常善良的人。

[Example]
Time reveals a person's heart. Soon you will find that he is actually a kind-hearted person.