Due to the laws of nature, it is impossible to remain inactive. Therefore, it is necessary to do the right thing. Doing right thing means (1) doing things according to swabhava/nature (2) not doing something against your conscience. An empty mind can become devil’s workshop by doing wrong work. Or, an empty mind can be consumed by random thoughts draining vital energy compromising health. An attitude of doing natural work considering it as your need to do so is Karma-Yoga.
Let us analyse the statement, “The moon is out there in front of me whethere I look at it or not.”
The light from the moon reaches eyes, and the signal from the eyes goes to the brain and mind interprets the signal as moon. It is just the signal that is reaching the brain that the mind reads as moon. Even if the moon is not out there but the signal is there, mind still labels it as moon. In dream for example there is no moon out there but it still appears to be moon. So, actually what is interpreted depends solely on the signal. If moon is experienced, we cannot infer that physical moon is necessarily out there. Hence, the statement is not necessarily correct. Moon may appear to be out there, but what appears need not necessarily be real.
If we go a step ahead then where is the moon for the inert stone. It is only due to the body instruments (senses, brain etc.) does the moon exist for us. An ammeter shows the current, the brain shows the moon. There is no experience in the absence of a suitable measuring instrument or signal.
Since one can see the moon even by closing eyes, it is clear that it is mind that takes the shape of the moon. The logic that is applied to sight can be applied to sound, taste, smell, touch as well. Since it is mind that takes various forms, all we can say with certainty is that everything is mind only. Consciousness and still mind are synonemous. We Are THAT.