Can the Dhamma Teaching be given in short?

Yes! The Blessed Buddha once instructed his son Rāhula in this way:
Having left behind desire for the five streams of simple sensual pleasure,
captivating forms, satisfying the mind, having gone forth from the house in
faith, put an end to suffering! Cultivate Noble friends, an isolated lodging,
which is, solitary, secluded, silent, with little traffic. Be moderate in eating!
Do not crave neither for a fine robe, nor food, nor requisites, nor lodging!
Do not return to the worldly life again... Be fully controlled regarding the
monastic discipline and the five sense abilities. Be completely & constantly
aware of the body as a frame of bones, skin, and flesh. By disgusted with
all in this world. Avoid beautiful objects, which provokes lust. Make mind
one-pointed, concentrated, absorbed, well focused on non-attractiveness.
Develop the signless mind. Cast out all latent tendency to the conceit: I am!
Then by the full understanding of self-deception you will wander and dwell
stilled, in perfect peace... Sn 337-342

More on the Buddha's son Rāhula, who was the most intent on the training:
http://What-Buddha-Said.net/library/DPPN/r/raahula.htm
He awakened in Andhavana forest, when hearing the Cūla Rāhulovāda Sutta:
http://www.accesstoinsight.org/tipitaka/mn/mn.147.than.htm

To my Son!