Simple Living High Thinking

If one is truly serious about achieving the ultimate goal of human life by perfecting his spiritual inquiry, he must adopt a life style that is conducive to the cultivation of self-realizing knowledge. This life style can be beautifully summarized in the phrase 'simple living and high thinking'. Here simple living is in relation to maintenance of the body, and high thinking is in relation to the aim of one's intellectual pursuits.
In order to exist in this world it is necessary to maintain one's bodily existence, but as will be shown in later lessons, maintenance of the body is not progress towards the goal of life. Maintenance just allows one to perform the activity of existing in a particular body, which does not denote any accomplishment of a goal. This maintenance of the body involving mainly our activities of eating, sleeping, mating and defending is not in itself any great feat opportunity achievement. Even the animals are engaging in these activities of bodily maintenance. The cows also eat, the birds also mate, the hogs also sleep and the dogs also defend. Simply engaging in these activities of maintenance does not actually make one human. For this reason, one who is interested in achieving the real, permanent goal of life does not focus solely on these activities of bodily maintenance, but he rather focuses primarily on the path of perfection. This is why he adopts the process of simple living.
The basic principle of simple living is accepting whatever is necessary for maintaining the body, so that we can use the energized body for higher philosophical pursuits directed towards our pure self identity. One only accepts that which is necessary for existence and does not take anything that is an unnecessary complication to life. In this way, by the process of living simply, one will be able to, if properly directed, arrive at the point of 'high thinking', the actual human essence.
What exactly is the meaning of 'high thinking'? High thinking entils the