
The Blessed Buddha once said:
When attending rationally sense-desire neither
arises, nor expand.
When attending rationally evil-will neither arises,
nor later expand.
When attending rationally lethargy & laziness does neither
emerge nor grow.
When attending rationally restlessness & regret cannot
arise or amplify.
When attending rationally doubt & uncertainty does
not begin or blow up.
Furthermore, when attending carefully & rationally to
cause and effect:
The awareness link to awakening arises, and is gradually
developed.
The
investigation link to awakening arises, and is gradually developed.
The
energy link to awakening arises, and is gradually developed.
The joy link to
awakening arises, and is gradually developed.
The tranquillity link to
awakening arises, and is gradually developed.
The concentration link to
awakening arises, and is gradually developed.
The equanimity link to
awakening arises, and is gradually developed!


More on Attention: (Manasikāra):
http://en.wikipedia.org/wiki/Attention
https://What-Buddha-Said.net/drops/IV/Careful_Attention.htm
https://What-Buddha-Said.net/library/DPPN/wtb/g_m/manasikaara.htm



Source (edited extract):
The Grouped Sayings of the Buddha. Samyutta Nikāya.
Book [V:93-4] section 46: The Links. 35: Careful Attention...


Careful Attention!