Dear Indology Friends,

In promotional material released by the organisation I am researching they have used the two following quotes in their e-patrikā. My problem is that I am struggling to locate the original Sanskrit verse or the name of the original text. 

1) All I have is the following, which as you can see is a translation into English. I'd like to find the original text if possible.  

'In the Upaniṣads, the sage Yājñavalkya says, “We don’t love each other for the sake of each other, we love each other for the sake of the divine Self that dwells within".' 

2) The organisation only refers to 'Upaṇiṣad Mantra 5' as the location of the following verse.

Nityo’nityānāṁ cetanścetanānāṁ eko bahūnāṁ yo vidadhāti kāmān | tam ātmasthaṁ ye’nupaśyanti dhīrāsteṣāṁ śāntiḥ śāśvatīrnetareṣām ||

Once again, if anyone knows which upaṇiṣad this comes actually comes from I would really appreciate knowing. 

Thanks in advance.