The section of text which begins, “If, on the other hand, a person were to receive and hold from this sutra,” was spoken by Śākyamuni Buddha. Receive means that the mind receives it. Hold means that the body puts the teaching into practice. …

In general, one may memorize any four-lines that suit him and explain them to others. One should not interpret the passage of sutra text in this section as referring only to the verses in this particular sutra, because the dharma is not fixed; it’s not inflexible. If one insists on a given four lines, the dharma becomes static. The Vajra Sutra subdues the mind and rids it of rigid attachments, enabling it to separate from all marks. It sweeps away all phenomena and separates from all marks. Separation from all marks is Buddhahood. Do not be attached to a particular four lines. Keep the dharma alive! Let it be like a vital dragon, like a coursing tiger. Speak the sutra until it leaps and bounds. Talk until it soars. Do not be so stuffy that you put everyone to sleep, and then be so stupid as to think your lecturing has caused them to enter samadhi.

Receiving and holding the sutra is self-benefitting cultivation which leads to self-enlightenment. Explaining it to others benefits and enlightens them.

If you can receive and hold a four-line gāthā yourself, and speak it for others, the blessings and virtue of that act are far greater than the blessings and virtue derived by the person who gives three thousand great thousand world systems full of the seven precious gems as a gift. Why? Because the giving of dharma is the most supreme kind of giving, and as such far surpasses the giving of wealth.