Hardy's weakness derived from his apparent inability to control the comings and goings of these divergent impulses and from his unwillingness to cultivate and sustain the energetic and risky ones.

【翻译】哈代的弱点源于他明显不能控制这些不同冲动的各种表现，源于他不愿意培养和保持那些充满活力和冒险的冲动表现。

【分析】在这个句子中，derived是个关键的谓语，后面跟了两个并列的from：

derived from his apparent inability to control：源于他明显不能控制......

(derived) from his unwillingness to cultivate and sustain：源于他不愿意培养和保持......

我认为，就ones 的指代关系来看，也应该是并列的，看红色部分。

control 的宾语是：the comings and goings of these divergent impulses

那么，cultivate and sustain 的宾语ones，应该也是指代the comings and goings of these divergent impulses，而不是these divergent impulses， 它是作定语的，中心词是the comings and goings，意思是“来来往往，出出进进”，引申为“各种活动；各种事情；各种表现”。