有缘千里来相会，无缘对面不相识
 
As decreed by providence you have met him; otherwise you might have failed although you traveled a long way. 有缘千里来相会，无缘对面不相识（逢）。

相关知识
  缘 reason; cause; sake, relationship, edge; fringe
  缘分 predestined relationship
  血缘 blood relationship
  姻缘 predestined marriage
  化缘 beg for alms
  天缘巧合 a luck coincidence
  有人缘 enjoy great popularity
  投缘的街坊们 congenial neighbors
  天赐良缘 a godsent marriage; a good marriage arranged in Heaven
  有缘结识某人 be lucky to get acquainted with sb.
  无缘结识某人 have no opportunity to get acquainted with sb.
  婚姻是缘分。 A couple's conjugal fate is prearranged.
  有缘终相逢。 Fate brings together people who are far apart.
  无缘不相逢。 There is no meeting without predestination.
  我与烟酒无缘。 Smoking and drinking don't appeal to me.
  好事似乎与他无缘。 Good luck seemed to be wholly denied to him.

  有缘分的人 哪怕相隔千山万水 也能遇到一起 没缘分的人 就算面对面遇见 也不会认识 缘分天注定
  缘分是天注定的 有缘的人无论在那里都会感到对方的感觉