to start something from the very beginning
начать что-то с самого начала (nachat' chto-to s samogo nachala)
"They built the company from scratch with no outside funding."
"Они построили компанию с нуля, без внешнего финансирования." (Oni postroili kompaniyu s nulya, bez vneshnego finansirovaniya.)
learning through difficult life experiences
To stay focused on achieving a goal.
used humorously to let an older person go first
to share gossip or secrets
to not completely believe something
to start having doubts about a decision you have made