采用了被动语态结构 built upon，突出了基础的重要性。
Love is a luxury to a man, but it is life itself to a woman. — Lord Byron
Love not only occupies the vastness of the heart, but sometimes breaks into the most guarded of souls. — Francis Bacon
The noble element of love is no less significant than its gentle side, and its power to uplift is no less than its power to wither; sometimes, it even inspires other virtues. — Voltaire
Because love enters the heart, it cannot be driven out by beating or scolding. Once it has taken hold of you, it will possess everything about you. Since you have already fallen in love, there is no way out; the only way is to find the most efficient way to fulfill your desire. — Stevenson
Love is not sweet words under the shade of flowers, nor honeyed words in a paradise; it is not soft tears, nor is it rigid coercion; Love is built upon a foundation of common understanding. — Shakespeare
爱情对于男人不过是身外之物，对于女人却是整个生命。——乔·拜伦
爱情不仅会占领开旷坦阔的胸怀，有时也能闯入壁垒森严的心灵。——培根
爱情之中高尚的成分不亚于温柔的成分，使人向上的力量不亚于使人萎靡的力量，有时还能激发别的美德。——伏尔泰
因为爱情进入了人的心里，是打骂不走的。它既然到了您的身上，就会占有您的一切。您既然已经爱上了，事情就只好如此，唯一的途径是想个最便宜的方法如愿以偿。——斯蒂文生
爱情不是花荫下的甜言，不是桃花源中的蜜语，不是轻绵的眼泪，更不是死硬的强迫，爱情是建立在共同语言的基础上的。——莎士比亚
"Arguments can become a form of mutual understanding and interdependence."
"as long as there are days of understanding"
"Tacit understanding begins with conversation and evolves into belief."
"There is no need for explanations to those who understand"
"Human relationships are bidirectional and require mutual understanding."