以下是莫忘初衷的英文佳句：
"Don't forget why you started in the first place."
"Don't lose sight of your original intention."
"Never lose sight of your goals, for they are the driving force that guide you through the journey."
"Keep your focus, don't lose your way, for it is your original intention that will guide you through the challenges of life."
"Don't let the journey get you lost, remember why you started."
希望這些句子能幫助您理解並表達“莫忘初衷”這一主題。