The Name Namo Amitabha Buddha carries the meanings to surpass the bondage of time and space. From the angle of immeasurable lifespan, it far-surpasses the bondage of time. From the angle of immeasurable lights, it far-surpasses the bondage of space. The speed of lights is the fastest in this worldly realm. But in the Buddha Dharma, there is no speed as everything is immeasurably large. As I have just spoken, the inexhaustible greatness. Immeasurable lights mean at any time, any place, it exists as light at that place. So, when the Buddhas and Bodhisattvas rescue living beings, it does not mean that they run here from the World of Ultimate Bliss. They are here at this instant as they are the immeasurable lights. We feel the distance when we say far-away places. But the Buddhas and Bodhisattvas do not harbour the concept of far or near. So, this is known as ‘immeasurable brightness.’
‘Namo’ is taking refuge. It means we give up our body and mind, our lifespan and everything to Amitabha Buddha, the Greatly Enlightened one who dwells ultimately in the state of freedom and great ease, which far-surpasses the bondage of time and space. We take refuge in the Buddha’s rescue and we will arrive at the limitless, immeasurable state with no obstacles. When we take refuge in Amitabha Buddha, we will obtain the lifespan of Amitabha Buddha, living the life of Amitabha Buddha, leading a life of immeasurable lights and lifespan. This resembles a drop of water which enters the great ocean will obtain the expansiveness of the ocean, the immeasurable profundity of the ocean. By Dharma Master Shi Jing Zong
南无阿弥陀佛名号的含义就是超越了时间、空间的束缚。从无量寿来说，是超越了时间的束缚；从无量光来说，是超越了空间的束缚。光，是我们这个世间最快的速度，但在佛法当中其实没有速度，是无量大的，刚刚讲的是无穷大。无量光，就是在任何时候、在任何地点，它都是以光存在这个地方。所以，佛菩萨救度众生，并不是从极乐世界跑到娑婆世界来，他当下就在这里，因为他是无量光；在更远的世界，我们觉得远，佛菩萨没有什么远和近的概念，所以这叫“无量光明”。
“南无”是归命，就是我们的身心性命，我们的一切，归投于超越时间束缚，超越空间束缚，达到无限、无碍、无量，这种绝对自由自在境界的大觉悟者——阿弥陀佛，归命于他的救度。归命于阿弥陀佛，你就获得弥陀的寿命，就获得弥陀的生命，无量光寿的生命。就好像一滴水归入大海，就获得大海一样的广阔、深广无量。
——净宗法师
A comment by oridharma: If we do not recite Namo Amitabha Buddha, we are controlled by time and space because of our ignorant mind of attachment. So, the recitation of Namo Amitabha Buddha is the great kindness and great compassion of Amitabha Buddha as he has accomplished the full merits and virtues to liberate us from the triple realm, relying on the Karmic strength of his magnificent vows. Most grateful to Namo Amitabha Buddha
如果我们不称念南无阿弥陀佛， 就被时空所限制， 因为我们的无明与执着。所以称念南无阿弥陀佛是因为佛的大慈大悲, 他把所有圆满成就的功德，佛的大愿业力来救度我们出三界。感恩南无阿弥陀佛
I'm ORI the Light 