Veyitain veyachzor veyitain. Why twice?
Ba'al aveida mechazer achar aveidaso. Ta'isi ke'seh oved. The yidden are the aveidah of the RBSO.
The bracha was that the RBSO should give. And even though some Yidden aren't worthy or even aware of their need to receive, we ask that He seek us out (veyachzor) and bring us to Him and redeem us.
Aish Kodesh - Piascezna 1940