If you do so, you will do well, and that which you are obliged to do to their Highnesses, and we in their name shall receive you in all love and charity, and shall leave you, your wives, and your children, and your lands, free without servitude, that you may do with them and with yourselves freely that which you like and think best, and they shall not compel you to turn Christians, unless you yourselves, when informed of the truth, should wish to be converted to our Holy Catholic Faith, as almost all the inhabitants of the rest of the islands have done. And, besides this, their Highnesses award you many privileges and exemptions and will grant you many benefits.
This specific part shows the noble intentions Spain had towards the new people they had encounter in the new world. Unlike other empires such as the British or the French, the Spanish empire oficial position was to always pursue peace before war in the Americas, and always tried to unify with the natives, and saw them as equal as any other spanish in front of the crown.
This was due (among other factors) to the fact that the queen Isabel "La Católica" was very catholic, and following the teachings she learned from catholicisim, she always ordered that the natives should be treated well and no harm should be done upon them. She even ordered Columbus to punish any man who would harm the natives (something Columbus later ignored).