My take on the above links:
Irrationalism vs. Spock
Logic alone does not assess the context of its thinking process. It does not
care that you may be impatient. When are emotions of value? When they help
us arrive at fairly intelligent choices in a shortened amount of time. If
this effort is put into furthering creative development, it has "more"
value. When the effort is for simple survival (fear) it has "less" value.
Fairly intelligent choices are a balance of function between the great
conceptional neocortex and the emotional mamalian brain. If the mamalian
brain is left to reason with the lower lizard brain then decisons will be
primitive. Developing creative neocortex influence turns more emotions into
feelings and a higher intelligence response.
"It had previously been assumed that the highest level of the brain, the
neocortex, dominates the other, lower levels. MacLean has shown that this is
not the case, and that the physically lower limbic system, which rules
emotions, can hijack the higher mental functions when it needs to."